package homework0322;

public class Homework4_7 {

	public static void main(String[] args) {
		int last = 1;
		int now = 1;
		for (int i = 1; i <= 18; i++) {
			int temp = now;
			now = last + now;
			last = temp;
		}
		System.out.println(now);
	}
}
